CVE-2026-21051 Samsung Mobile CVE debrief

Who should care

Security teams responsible for managing and updating WLAN security configurations, particularly for Samsung devices, should be aware of this vulnerability. These teams should review and update WLAN security configurations to ensure proper permissions and apply SMR Jul-2026 Release 1 or later to affected devices. Additionally, teams should monitor for local attack attempts and implement compensating controls as needed.

Technical summary

CVE-2026-21051 is a medium-severity vulnerability related to incorrect default permissions in WLAN security prior to SMR Jul-2026 Release 1. This issue allows local attackers to configure TencentWifiSecurity settings. The vulnerability affects Samsung devices and has a CVSS score of 5.1. The incorrect default permissions could allow local attackers to modify WLAN security settings, potentially leading to unauthorized access or disruption of WLAN services.

Defensive priority

Medium priority due to local attack vector and potential impact on WLAN security. However, given the local attack vector, it is essential to implement compensating controls and monitor for potential attacks.

Recommended defensive actions

• Review and update WLAN security configurations to ensure proper permissions.
• Apply SMR Jul-2026 Release 1 or later to affected devices.
• Monitor for local attack attempts and implement compensating controls as needed.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record and NVD detail provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the issue and its potential impact. The evidence is based on the official CVE record and NVD detail, which may have limitations in their descriptions. Additional verification tasks are recommended to ensure a comprehensive understanding of the vulnerability.

Official resources